AN ANALYSIS OF STRESS-CONCENTRATIONS CAUSED BY SHOT PEENING AND ITS APPLICATION IN PREDICTING FATIGUE-STRENGTH
AN ANALYSIS OF STRESS-CONCENTRATIONS CAUSED BY SHOT PEENING AND ITS APPLICATION IN PREDICTING FATIGUE-STRENGTH
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DOI：
10.1111/j.1460-2695.1992.tb01262.x
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发表时间：
1992-12-01
影响因子：
3.7
通讯作者：
WANG, RZ
中科院分区：
文献类型：
--
作者：
LI, JK;YAO, M;WANG, RZ
为了计算喷丸凹坑引起的应力集中，本文提出了一个凹坑模型、七个凹坑模型和一个凹坑环模型三种简化模型。利用有限元自动动态增量非线性分析程序，计算了不同基坑参数和不同应力场条件下基于上述模型的应力集中系数。在考虑喷丸应力集中和残余应力场的情况下，提出了修正的Goodman公式，并用于预测表面有疲劳源的喷丸试件的疲劳强度。通过40Cr钢的冲击疲劳试验验证了预测结果。
In order to calculate the stress concentration caused by shot-peening dents, three simplified models, namely a one-pit model, a seven-pit model and a pit loop model, are proposed in this paper. By using a finite element program for automatic dynamic incremental non-linear analysis, the stress concentration coefficients based on these models are calculated for different pit parameters and different stress fields. When considering the stress concentration and residual stress field produced by shot peening, a modified Goodman formula is proposed and used for forecasting the fatigue strength of peened specimens having the fatigue sources at the surface. The forecasted results were verified by peening followed by fatigue tests on 40Cr steel.